A turbulence model for buoyant flows based on vorticity generation. | Zendy

Stefan P. Domino | Zendy; V.F. Nicolette | Zendy; Timothy J. O’Hern | Zendy; Sheldon R. Tieszen | Zendy; Amalia Black | Zendy

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A turbulence model for buoyant flows based on vorticity generation.

Author(s) -

Stefan P. Domino,

V.F. Nicolette,

Timothy J. O’Hern,

Sheldon R. Tieszen,

Amalia Black

Publication year - 2005

Language(s) - English

Resource type - Reports

DOI - 10.2172/875637

Subject(s) - turbulence , buoyancy , vorticity , physics , k epsilon turbulence model , k omega turbulence model , turbulence kinetic energy , mechanics , context (archaeology) , plume , potential vorticity , statistical physics , meteorology , classical mechanics , vortex , geology , paleontology

A turbulence model for buoyant flows has been developed in the context of a k-{var_epsilon} turbulence modeling approach. A production term is added to the turbulent kinetic energy equation based on dimensional reasoning using an appropriate time scale for buoyancy-induced turbulence taken from the vorticity conservation equation. The resulting turbulence model is calibrated against far field helium-air spread rate data, and validated with near source, strongly buoyant helium plume data sets. This model is more numerically stable and gives better predictions over a much broader range of mesh densities than the standard k-{var_epsilon} model for these strongly buoyant flows

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